Mazirek, Kraul Death Priest, Putrid Goblin, and Viscera Seer

Prerequisites

• Mazirek, Kraul Death Priest on the battlefield
• Putrid Goblin on the battlefield
• Viscera Seer on the battlefield
• Putrid Goblin does not have a -1/-1 counter on it

Steps

1. Activate Viscera Seer by sacrificing Putrid Goblin
2. Putrid Goblin dies, triggering its persist ability and Mazirek
3. Resolve the Putrid Goblin trigger, returning it from your graveyard to the battlefield with a -1/-1 counter on it
4. Resolve the Mazirek trigger, putting a +1/+1 counter on each creature you control
5. Resolve the Viscera Seer ability from step 1, causing you to scry 1
6. Repeat

Results

• Infinite +1/+1 counters on all creatures you control except Putrid Goblin
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite scry 1